index.js

require('dotenv/config')
const { Client } = require ('discord.js');
const { OpenAI } = require ('openai');

const client = new Client ({
    intents: ['Guilds', 'GuildMembers', 'GuildMessages', 'MessageContent']
})

client.on('ready', () => {
    console.log('The Bot is online.');
});

const IGNORE_PREFIX = "!";
const CHANNELS = ['1205190183784550501']

const openai = new OpenAI({
    apiKey: process.env.OPENAI_KEY,
})

client.on('messageCreate', async (message) => {
    if (message.author.bot) return;
    if (message.content.startsWith(IGNORE_PREFIX)) return;
    if (!CHANNELS.includes(message.channelId) && !message.mentions.users.has (client.user.id)) return;

    await message.channel.sendTyping();

    const sendTypingInterval = setInterval (() => {
        message.channel.sendTyping();
    }, 5000);

    let conversation = [];
    conversation.push ({
        role:'system',
        content: 'Chat GPT is a friendly chatbot'
    });

    let prevMessages = await message.channel.messages.fetch ({ limit: 10});
    prevMessages.reverse();

    prevMessages.forEach((msg) => {
        if (msg.author.bot && msg.author.id !== client.user.id) return;

        const username = msg.author.username.replace(/\s+/g, '_').replace(/[^\w\s]/gi, '');

        if (msg.author.id === client.user.id) {
            conversation.push ({
                role: 'assistant',
                name: username,
                content: msg.content,
             });

             return;
        }

        conversation.push({
            role: 'user',
            name: username,
            content: msg.content,
        })
    })


    const response = await openai.chat.completions
        .create ({
            model: 'gpt-4.0',
            messages: conversation,
        })
        .catch((error) => console.error('OpenAI Error:\n', error));

    clearInterval(sendTypingInterval);

    if (!response) {
        message.reply("Estou com problemas com a OpenAI API. Por  favor, espere um pouco.");
        return;
    }
    

    message.reply(response.choices[0].message.content)
});

client.login(process.env.TOKEN);